1. Pediatric Heart Transplant Study (PHTS) Group; Birmingham AL USA
2. Division of Pediatric Cardiology; Loma Linda University Children's Hospital; Loma Linda CA USA
3. Division of Cardiology; Ann & Robert H. Lurie Children's Hospital of Northwestern University; Chicago IL USA
4. Division of Pediatric Cardiology; University of Miami; Jackson Memorial Hospital; Miami FL USA
5. Division of Pediatric Cardiology; Cleveland Clinic Foundation; Cleveland OH USA
6. Division of Pediatric Cardiology; Riley Hospital for Children; Indianapolis IN USA
7. Division of Pediatric Hematology and Oncology; Stanford University School of Medicine; Stanford CA USA
8. Division of Cardiovascular and Thoracic Surgery; University of Alabama at Birmingham; Birmingham AL USA
9. Division of Pediatric Cardiology; Stanford University; Stanford CA USA